If your belt is at one inch tension it's to lose. My dealer told me to set it at 10mm. You can pick up a tool at a Harley Davidson shop that will help you set the correct belt tension.
The factory set the belt tension with a device similar to this:
http://www.gates.com/products/industrial...and-accessories Quote: First, enter belt mass constant, belt width and span length into meter using built-in keypad.
Didn't see these in the M3W manual
